Fountain pen cap and section



Oct. 30, 1934. S M SAGER 1,973,724

FOUNTAIN PEN CAP AND SECTION Filed Feb. 25. 1931 .4 LY .4 11.4.4.4 I Solomom 73. 5gye7z Patented Oct. 30, 1934 UNITED STATES PATENT OFFICE 1 Claim.

In the use ofvarious makes of fountain pens, it has been found that when the fountain pen is not in use and the writing end thereof is enclosed by the ordinary fountain pen cap that 5 excess ink remaining in the feeder and onthe pen point accumulates around the outer end of the fountain pen section, with the result that the excess ink leaks off of the end of the section and collects in the fountain pen cap. Due'to the leakage of ink from the fountain pen into the fountain pen cap, the interior of the cap and exterior of the fountain pen section become stained with the excess ink so that when the fountain pen is again used th hands of a user become stained with the excess ink.

For the purpose of obviating the leakage of ink from the feed bar and pen point to the exterior of the. fountain pen section and the interior of the fountain pen cap, this invention has been devised for the purpose of providing a fountain pen with a beveled section adapted to tightly interfit with a beveled liner or sleeve engaged in the closed end of the fountain pen cap to produce a non-leakable joint or fit between the section and the cap liner to produce an air tight chamber enclosing the feed bar and pen point so that any excess ink remaining on the pen point or in the outer end of the feed bar is prevented from leaking into the cap but is allowed to accumulate in a receiving pocket provided in an ink guard member forming the outer end of the fountain pen section and affording an arrangement whereby the accumulated excess ink is permitted to gradually flow back through the feed bar grooves into the ink chamber of the fountain pen barrel.

It is an object of this invention to provide a fountain pen with a section having a beveled ink guard formed thereon to interfit with the beveled end of a cap liner sleeve to completely obviate the leakage of ink from the fountain pen feed bar and pen point into the portion of the cap which surrounds the section and the section carrying end of the fountain pen barrel.

It is also an objectof this invention to provide a fountain pen wherein the fountain pen section and the cap liner sleeve are both provided with beveled surfaces adapted to be brought into tight interfitting relation when the cap is engaged in place to obviate leakage of ink into the fountain pen cap andaround the exterior of the fountain pen section. i

A further object of the invention is to provide a fountainpen with a section having a chambered beveled ink guard positioned to the exterior of the peripheral flange of the section to permit the beveled end surface of an inner cap secured in the closed end of the fountainpen cap to be brought into tight frictional contact with the beveled surface of the section ink guard to obviate the leak age of ink from the interior of the inner cap and from the writing end of the fountain pen into the outer or main cap of the fountain pen.

It is furthermore an object of this invention to provide a fountain pen having a closure cap provided with an interior cap closed at one end and having a beveled surface at the opposite end to form a tight frictional fit with the beveled end surface of the fountain pen section to form a tight chamber between the section and the inner cap and around the pen point and feed bar to prevent the leakage of excess ink into the chamber surrounding the fountain pen section when the main closure cap is engaged on the fountain pen barrel.

An important object of the invention is the provision of an improved fountain pen wherein a beveled surface of a fountain pen section and the beveled surface of an inner cap or sleeve provided in the main fountain pen cap are adapted to be brought into rotational frictional engagement, obviating the squeezing or forcing of any excess ink outwardly into the main cap, but allowing the excess ink between the bevel surfaces to flow inwardly into a pocket or groove in the section.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanying drawing.

The invention (in a preferred form) is illustrated in the drawing and hereinafter more fully described.

On the drawing:

Figure l is an enlarged fragmentary sectional view of the pen point end of a fountain pen equipped with an improved section and an improved inner cap embodying the principles of this invention and showing the section and inner cap with the beveled. surfaces thereof tightly interlocked.

Figure 2 is a reduced longitudinal section of the fountain pen cap illustrating the improved inner cap in elevation.

Figure 3 is a fragmentary elevational view of the fountain pen section illustrating the beveled end surface and the excess ink-receiving chamber provided in the ink guard member or end of the section.

As shown on the drawing: 7

The reference numeral 1 indicates a fountain pen barrel provided with an ink chamber 2 and having the open end thereof internally threaded Eli) at 3 and externally threaded at e. Threaded into the internally threaded portion 3 of the barrel is the externally threaded shank "I of an improved fountain pen section embodying improved features of this invention. The threaded shank '7 is integrally formed on the inner end of an externally tapered section body 8 the interior of which is provided with an axial passage 9, the inner end of which terminates in the chamber of the shank portion '7 while the opposite end communicates with the inner end of a surplus or excess ink receiving pocket or recess 5 provided in an extension sleeve or collar 6 which serves as an ink guard member and which is integrally formedcn the outer end of the body of the section 8 to the outside of a stop ring or flange 11. The flange 11 is integrally formed externally on the outer end portion of the section body8 whereitoins'the ink guard sleeve or collar 6. The ink guardsleeve or collar 6 has the end thereof reamed out or formed to provide-an inner beveled end surface 12. The

beveled surface -12 extends inwardly and joins the walls forming the excess ink chamber 5 of the back into the inkchamber 2 of the fountain pen barrel when the fountain pen is positioned in an upright position with the pen point pointing upwardly.

The fountain penis provided with a main or outer cap :15 open at :one end and closed at the oppositeend 16. The interior of the main cap 15 is provided with an interiorly threaded-section 17 adapted to be threaded on the exteriorly threaded portion f the inkbarrel 1 when theoutercap is positioned as illustratedin Figure .1 to enclose the writing end of the fountain pen.

Tightly wedged or otherwise rigidly secured within the closed end 16 of the main outer cap 15 is an improved inner cap or liner embodying another of the improved-members of the fountain pen. The inner cap or liner comprises an enlargedsleeve or body portion 18 oneend of which is shaped or formedtoprovide an exterior beveled end surface 19 adapted to be moved into tight frictional interfitting contact with the beveled surface 12 of the ink guard member 6 when the outer fountain-pencap is engaged on the barrel 1 to enclose the writing end of the fountain pen. integrally formed on the oppositeendof the inner cap sleeve or body portion 18 is'a closedend section or head portion 20 of reduced diameter to tightly fit withina complementally shaped chamber provided in the closed end 16 of the outer cap 15, asclearly illustrated in Figure 1. The inner fountain pen cap has the exterior surfaces thereof tightly contacting the inner surfaces of the closed end of thecap 16 with the exception of thebeveled end surface 19 which is spaced from the interior surface of the cap 15 to permit the inner cap beveled surface 19 to be rotatably advanced into frictional interfitting engagement with the bev- :eled end surface 12 of the ink guard member 6 when the outer cap :15 is threaded over the exteriorly threaded portion 4 of the fountain pen barrel 1, as clearly illustratedin Figure :1.

When the outer fountain pen cap is engaged on leaking out of the chamber 21 into the chamber 22 which surrounds theouter portion of the sectionS and the ink guard 6 forming a part thereof.

It will thus be noted that the improved beveled inner cap rotationally interfitting with the beveled-endof thesection affords a self-cleaning arrangement of the beveled surfaces and obviates .any tendency of excess ink returned from the pen point and the feed bar to leak or be squeezed outwardly between the interfitting beveled surfaces out of the chamber 21 into the chamber 22 provided in the outer cap 15. The interior surfaces of the outer cap 15 and the exterior surfaces of the ink guard 6 and the section 8 are thus kept clean of ink accumulation which, in earlier types of fountain pens, has been oneof the defects which have alwayscaused considerable trouble and -an noyance to users of fountain pens. With the improved beveled :inner cap and ink guard member 6 tightly interfittingone another when the outer cap 15 is engaged on the fountain .pen barrel 1 the excess ink on the pen point 14 and in the feed bar 13 is forced or pushed inwardly by the beveled end of the innercap intothe receiving chamber 5 of the inkguard 6, allowing the ink to be gradually returned into the chamber 2 of the fountain pen barrel.

When the fountain penis .not in use, the outer cap 15 is adapted to the threaded onto the fountain pen barrel :1 :an amount sufficient to permit the beveled .end .of the inner'cap 18 to be projected into the end of the .ink guard 6 with the innercap beveledsurface Bend the beveled surface 112 of the ink guard 6 frictionally interfitting one another to form a .tight fit between the fountain .pen section and the inner .cap so that regardless of the .position of the fountain pen when thesame isiclosed, the leakage of ink from the chamber '21 between the ink guard-6 and the inner cap .18 into the chamber 22 of the outer cap 15 iscompletely eliminated.

It will, of course,beunderstood that various details of construction may be varied through a wide range without departing from the principles of this invention,.and itis therefore not the'purpose toiimit'thepatent granted hereon otherwise than is necessitated by the .scope of the appended claim.

I claimas my invention:

In afountain pen, the combination with a pen barrel, of a sectionsecured therein having an external flange formed thereonand having a portion of increased 'bore extending outwardly beyond said flange to definea space for the reception of ink leaking from the pen, the .outerend of said section having an inner beveled end surface, anda cap for said pen removably threaded V on said barrel to enclose said section, said car) being provided with an inner .cap firmly secured therein, said inner cap having a beveled end to 'telescope'within the outer end of said section and make a wiping contact with the beveled end surface thereof as the outer cap is screwed in posi- :tion.

SOLOMON M. SAGER. 

